How to target Route53 A record to ApiGateway v2 - aws-cloudformation

Question

There's an alias for ApiGateway 1, but it's interface doesn't conform to V2:
Here's domainName:
const domainName = new apigw2.DomainName(config.scope, config.id + 'DomainName', {
domainName: config.domainName,
certificate: config.certificate,
});

Answer 1

It doesn't look like aws-route53-targets packages supports apigatewayv2 yet. In the meantime you can probably wrap the v2 object in the v1 interface like this:
new route53.ARecord(config.scope, config.id + "AliasRecord", {
recordName: config.domainName,
target: route53.RecordTarget.fromAlias(
new route53targets.ApiGatewayDomain({
...domainName,
domainNameAliasDomainName: domainName.regionalDomainName,
domainNameAliasHostedZoneId: domainName.regionalHostedZoneId
})
),
zone: config.hostedZone
});

Answer 2

The documentation for Custom Domain is the starting point. However, it does not generate any record in Route53 by default.
To get this sorted for ApiGatewayV2:
Follow the steps as in the mentioned documentation and set up your API Gateway.
You need to use #aws-cdk/aws-route53 and #aws-cdk/aws-route53-targets and the example that mentions API Gateway V2.
So that:
// From the API Gateway setup (step 1)
const apiProdDomain = new DomainName(this, '...', {...})
...
new r53.ARecord(this, 'YourDomainAliasRecord', {
zone: yourDomainHostedZone,
recordName: yourDomainPrefix, // i.e 'api' for api.xxx.com
target: r53.RecordTarget.fromAlias(new ApiGatewayv2DomainProperties(apiProdDomain.regionalDomainName, apiProdDomain.regionalHostedZoneId)
})
That's it.

Answer 3

You could try it the way it's described in the documentation for Custom Domain
const certArn = 'arn:aws:acm:us-east-1:111111111111:certificate';
const domainName = 'example.com';
const dn = new DomainName(stack, 'DN', {
domainName,
certificate: acm.Certificate.fromCertificateArn(stack, 'cert', certArn),
});
const api = new HttpApi(stack, 'HttpProxyProdApi', {
defaultIntegration: new LambdaProxyIntegration({ handler }),
// https://${dn.domainName}/foo goes to prodApi $default stage
defaultDomainMapping: {
domainName: dn,
mappingKey: 'foo',
},
});